NEN EN 12057 : 2015

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
  4.1 Requirements for geometric characteristics
       4.1.1 General
       4.1.2 Requirements for dimensions, flatness and
              squareness
       4.1.3 Requirements for surface finish
  4.2 Requirements of natural stone for modular tiles
       4.2.1 General
       4.2.2 Denomination
       4.2.3 Visual appearance
       4.2.4 Flexural strength
       4.2.5 Bond strength adhesion
       4.2.6 Water absorption at atmospheric pressure
       4.2.7 Reaction to fire
       4.2.8 Water absorption by capillarity
       4.2.9 Apparent density and open porosity
       4.2.10 Frost resistance
       4.2.11 Thermal shock resistance
       4.2.12 Water vapour permeability
       4.2.13 Abrasion resistance
       4.2.14 Slipperiness behaviour
       4.2.15 Tactility
5 Marking and packaging
6 Evaluation of conformity and factory production control
  6.1 General rules
  6.2 Initial type testing
  6.3 Factory production control
Annex A (normative) Sampling
  A.1 General
  A.2 Principles of sampling
  A.3 Taking bulk samples
  A.4 Preparing a sampling plan
  A.5 Sampling apparatus
  A.6 Sampling methods
       A.6.1 General
       A.6.2 Sampling from quarries
       A.6.3 Sampling from plants
       A.6.4 Sampling from buildings
  A.7 Marking, packaging and dispatch of the samples
  A.8 Sampling report
Annex ZA (informative) Clauses of this European Standard
                       addressing the provisions of the EU
                       Construction Products Directive
  ZA.1 Scope and relevant characteristics
  ZA.2 Procedures for the attestation of conformity of
       products
  ZA.3 CE marking and labelling
       ZA.3.1 CE marking
       ZA.3.2 Reference model for marking and labelling
  ZA.4 EC Declaration of conformity
Annex ZB (informative) Clauses of this European Standard
                       addressing the provisions of the EU
                       Construction Products Directive
  ZB.1 Scope and relevant characteristics
  ZB.2 Procedures for the attestation of conformity of
       products
  ZB.3 CE marking and labelling
       ZB.3.1 CE marking
       ZB.3.2 Reference model for marking and labelling
  ZB.4 EC Declaration of conformity
Bibliography

Defines requirements for flat modular tiles of natural stone which are made for internal (including enclosed public transport premises) and/or external uses as floorings, stairs and wall and ceiling finishes.